Two-stage soil sifting device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 8, 2019
Grant Date -
N/A
app pub date -
Feb 20, 2018
filing date -
Feb 20, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
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US Family Size
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Non-US Coverage
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Abstract
The two-stage soil sifting device comprises a support frame, an upper sifter, and a lower sifter. The support frame comprises a rectangular base with cross braces and four vertical uprights that support the upper sifter and the lower sifter at elevated positions. The upper sifter comprises an upper sifter frame and a first mesh having a first mesh spacing. The upper sifter is located above the lower sifter and may be pivotally inclined with respect to horizontal. The lower sifter comprises a lower sifter frame and a second mesh having a second mesh spacing. As unsifted soil placed upon the upper sifter is moved over the surface of the upper sifter some of it passed through the first mesh onto the lower sifter and then through the second mesh onto the ground, leaving debris on the first mesh and on the second mesh.
First Claim
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Family
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International Classification(s)
- 2018 Application Filing Year
- B07B Class
- 148 Applications Filed
- 105 Patents Issued To-Date
- 70.95 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B07B Class
- 0 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 8, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 8, 2030 |